diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/classical-mechanics/n3/textbook.en.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/classical-mechanics/n3/textbook.en.md
index 6e3a2cba0..cd667ad90 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/classical-mechanics/n3/textbook.en.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/classical-mechanics/n3/textbook.en.md
@@ -10,6 +10,6 @@ lessons:
       order: 2
 ---
 
-#### Brainstorming to structure a theme "Classical mechanics" : level 1
+#### Brainstorming to structure a theme "Classical mechanics" : level 3
 
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